Combination stripping and cutting pliers.



S. E. AARON.

COMBINATION STRIPPING AND CUTTING PLIERS.

APPLICATION FILED SEPT. 5, 1912.

Patented May 19, 1914.

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Q f y ATTORNEY.

SOLOMON E. AARON,

To all whom it may concern Be it known that I, SOLOMON E. Aanon, a citizen of the United States, residing in Boston, in the county of Suffolk and State of Massachusetts, (whose post-oflice address is 93 Henley street, Charlestown, Massachusetts.) have inventcdccrtain new and useful Imprm'ements in Combination Stripping and Cutting Pliers, of which the following is a specification.

My invention relates to pliers used by linemen and electricians who handle and use insulated wire, whether of single or double electric conductors and consists of certain cutting edges of special form, coir struction and application so as to be adapted to cut away and strip off such portion oi? the insulating material as may be required. whether from single or double wires, and to entirely sever any wire at any point necessary.

My object is first to provide certain cutting edges of special form and so constructed as to be adapted to cutting the insulating material at any predetermined point and then quickly removing said material from a single electric wire. Second, to provide certain cutting blades for cutting through the outer insulating or covering material from double wires, thus preparing them for the removal of such material from each of the separated wires:

third, to provide cutting blades for entirely severing wire; and fourth; to provide suitable means for adjusting these several pairs of cutters so that any sized wire may be operated upon Without injury to the cutters or the wire. I accomplish these objects by means of the mechanism illustrated in the accompanying drawing, in which- Figure .1. is a side elevation of my device showing particularly the splitting knives for double wire, the rests for the same and the stripping cutters; Fig. 2 is an elevation of the opposite side showing especially the severing cutters, the stripping cutters and the adjusting device; Fig. 3 is a view of the top edge of my pliers as they are usually held in the hand; Fig. 4 is a face view of the stripping cutters; Fig. 5 is a cross section on the line w w, showing the splitting knives and rests for double wire; Fig. 6 is a cross section on the lines a: 03. showing the severing cutters; Fig. 7 is a cross section on the line y 3 showing the pivoting joint of the two principal parts or handles; and Fig.

COMBINATION STRIPPING AND CUTTING PLIERS.

Specification of Letters Patent.

Application filed September 5, 1912.

STATEtd PATENT OFFICE.

OF BOSTON, MASSACHUSETTS.

Patented May 1:), 1914. Serial No. 718,638.

8 is a section on the line 2 .2, showing the adjusting device.

Similar letters refer to similar parts in the several views.

A and B are the two parts or handles of my pliers, pivoted to each other by the screws a a, at the usual point. These screws do not pass entirely through thc'two parts of the joint, but enter from each side and extend only to the central hole b,-by which construction the wire to be operated upon may pass entirely through the pliers and extend to any distance forward or back of them.

Across the front of the plier bills are fixed the cutting and stripping cutters D D. These have their cutting edges quite sharply beveled inward so as to better adapt them to the stripping of the insulation from the wire operating in the manner of two chisels. In order to easily and elliciently cut the insulation down to the wire and still not injurc the latter, and to adapt them to different sizes of wire, two elliptical openings of dillerent dimensions are formed by crescent shaped notches in their cutting edges, as shown at (Z in Fig. %i. While I prefer this form as being the most etlicicnt, these notches may be circular, angular, or partake of both forms, and still be operative. To still further adapt the pliers to different sizes of wire two or more pairs of these cutters with dill'erent sizes of openings may be provided. These cutters may he on the side of the pliers but I prefer to locate them as shown.

Upon the right side of the plier bills are fixed the two splitting knives E E, (as shown in Fig. 9), and whose cutting contour is shown at E I), Fig. 1.

F F are two rests fixed to the right side of the plier bills one on each side of the splitting knives E E, (shown in elevation in Fig. 5). The position of a double wire, being split is shown in dotted lines at e.

G Gr, (Figs. 2 and 6), are the cutters for entirely severing the wire. This act-ion requiring considerable force they are placed near the fulcrum or pivoting screws (L a.

To prevent injury of the stripping cutters D I), the splitting knives E E and the severing cutters G G, the adjusting screw II is provided. This is screwed into a boss formed on the part A while its lower end rests upon a similar boss formed on the part .B. A knurled portion It provides a conven ient finger hold and the screw is secured in any desired position by the spring 8 fixed to the boss on the part A and has formed uponits lower end a small knife-edge whichengages slight notches in the upper edge of the knurled portion h. The adjusting screw "H is located at one side of the central line so as to be out. of the way of a piece, of wire passed through the central opening I), as above described. a

The operation of my device is as follows: Assuming that the insulating material is to be stripped from a, single wire, the ad justing screw H is set so that the cutting edges of the strippin cutters will just admit the diameter of the wire without injuring'or cutting it. The wire is then assed in through the elliptical opening in the stripping cutters D D as far as desired and the handles AB pressed together until the insulation is cut through to the wire. The wire isheld stationary and by twisting the pliers half way around and back the insulation is cut all the way around, and by a smart pull on the pliers the insulation is stripped off, leaving thewire clean and in proper condition to make a good joint. Supposing a double wire is to have the insulation removed, it is first placed on the supportsF F, (as shown in dotted lines in Fig. 5), and by closing the handles A B the splitting knives E E are forced through the outer covering, when by a smart pull this covering is split to the end of the wire, which now becomes as two single wires whichmay be spread apart and the insulation may-be cut and stripped off as de-' scribed above. 7

The use of the severing cutters G G are the same as in the ordinary type of side cutting liers and are here used to make the combinationdevice for linemen complete without the necessity of' carrying another pair of cutting pliers.

It is apparent that the pliers may be made with the opening in the cutters slightly at one side of the central line of the handles, so that the wire from which the insulating material is to be removed may pass at one side of the joint instead of through it. It is readily seen that a cam, or some other form of adjustment, may be usedinstead ofthe screw, to limit the movement of the cutters.

The usual method of removing the in sulation from electric wires, in cases where two,

are to be joined, a bare end is needed to put oeaeee into a binding post, or for any similar purmuch more quickly and accurately performed, the stripping is done quickly and leaves the bare wire clean and in good condition for making a perfect electric contact. In handling double wire the outer covering is quickly split, the two wires separ'atedand the insulation cut around and removed very quickly, leaving the wires clean and ready for use. V

Having. described my invention and its objects and pointed out wherein it is a practical improvement over the usual devices and methods, I claim 1. In an implement of the class described, crossed handles and jaws; a block interposed between the handles at their place of crossing, such block being provided with an opening extending in parallelism with-the same jaw and disposed between the guides;

and an opposed splitting knife secured to the opposite j aw in alinement'with the first mentioned splitting knife.

4. In an implement of the class described, pivoted jaws; a pivoting block secured be tween the pivots of the jaws and provided with an. opening in alinement with the length of the implement and stripping knives secured. to the ends of the jaws and provided with notches spaced upon opposite sides of the axis of the opening. j

g SULOMON E. AARON.

Witnesses:

OsoAR E. Patrice, E. F. PIeEoN. 

